CN203239285U - Safety valve - Google Patents
Safety valve Download PDFInfo
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- CN203239285U CN203239285U CN 201320240512 CN201320240512U CN203239285U CN 203239285 U CN203239285 U CN 203239285U CN 201320240512 CN201320240512 CN 201320240512 CN 201320240512 U CN201320240512 U CN 201320240512U CN 203239285 U CN203239285 U CN 203239285U
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- valve plate
- valve
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- valve body
- safety
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Abstract
The utility model discloses a safety valve used for solving the problems that in an existing drilling construction process, when well logging during drilling is carried out, a drilling tool needs to be taken out, therefore, a drilling period is long, and potential safety hazards exist in the implement process of the well logging during drilling. The safety valve comprises a valve body of a hollow structure and further comprises a valve plate, wherein one side of the valve plate is movably connected in the valve body through a hinge pin, the valve plate is provided with a spring in a matched mode, the spring enables the valve plate to be reset, and the valve body is provided with a step which is matched with the valve plate in a sealing mode. The safety valve can achieve the well logging during drilling in the drilling process, shorten the drilling period, reduce drilling cost and ensure safety of the well logging implement in the drilling process.
Description
Technical field
The utility model belongs to the design and manufacturing technology field of drilling safety control appliance, is specifically related to a kind of safety valve, is used for the equipment that the oil and gas well drilling process prevents downhole fluid ejection ground.
Background technology
In the prior art, when carrying out the construction of oil and gas well drilling, because underground oil or natural gas has certain pressure; therefore, usually can run into downhole fluid and increase suddenly, and when the technician can't in time take measures; spray from the down-hole, cause the generation of gas blowout accident suddenly.When this happens, will carry out the construction of kill-job, then can not finish the construction of kill-job in the time of serious, cause serious gas blowout accident.
In order to solve this sudden event in wellbore construction, the technician has taked at rod string one way valve to be installed.Install after this equipment, during normal wellbore construction, drilling fluid injects underground enforcement jet drilling from ground by slush pump by drilling rod, and is taken the down-hole to ground by the landwaste of drill bit fragmentation.Present back-pressure valve comprises typical sword shape back-pressure valve, and the one way valve of other modes, be a kind of intensive connecting back-pressure valve of CN200420034052.2, a kind of cylindrical pressure return valve that the patent No. is CN201120184474.8, the patents such as a kind of Novel cementing back-pressure valve that the patent No. is CN201220469837.7 such as the patent No..
One way valve or the main technical scheme of back-pressure valve of these technology all are to be provided with one with the valve of the conical surface in a short circuit basically at present, when flowing to the down-hole under the promotion of drilling fluid at slush pump on ground, push the tapered valve in the short circuit open, make drilling fluid lead to the down-hole and implement wellbore construction; When the down-hole abnormal, when causing down-hole pressure greater than the head of liquid of pit shaft, the conical valve of short circuit is closed the passage of drilling tool under the back pressure of spring, reaches to prevent the downhole fluid purpose on ground of gushing out.The back-pressure valve of technology also is the technical scheme of comparative maturity preventing to have preferably effect aspect the technical purpose of well kick at present.
But, the shortcoming of technology is at present: along with improving constantly of drilling technology, situation for promptly and accurately grasp down-hole, the purpose that reaches rapid drilling and in time understand the down-hole formation situation, in the process of implementing wellbore construction, need to implement the well logging construction toward contact, because the back-pressure valve of prior art can not be by logging cable and instrument.Present method is, drilling tool with the down-hole trips out first, then be lowered to logging tool, taking out logging tool after surveying completion, be lowered to again drilling tool, continue to implement drilling engineering, because the centre of back-pressure valve is provided with the valve that moves up and down, the cable of well logging can not pass through, just can log well later so must get to bore, the survey completion is lowered to again later on drilling tool and could continues drilling well, so just needs a large amount of time, the result is the cycle that has affected greatly drilling well, cause the rising of drilling cost, more seriously, if in the process of well logging, owing to do not have the control of one way valve, just serious gas blowout accident might occur if well kick occurs.
The utility model content
The purpose of this utility model is in order to overcome the shortcoming of prior art, need not take out the safety valve that drilling tool just can allow logger to pass through in a kind of process that can be implemented in drilling well that adopted the unidirectional form design of opening of valve, can shorten the cycle of drilling well, reduce drilling cost, effectively control simultaneously gas blowout accident.
The utility model is to overcome the technical scheme that above-mentioned technical disadvantages adopts to be:
A kind of safety valve comprises valve body, and described valve body is hollow structure, it is characterized in that: also comprise valve plate, one side of described valve plate is in bearing pin is movably connected in valve body, and described valve plate is equipped with the spring that valve plate is resetted, and described valve body inner circle is provided with the step that cooperates with valve plate.Step can limit the position that valve plate moves up in reseting procedure.
Further, described step is provided with sealing surface, and described valve plate is provided with the sealing surface of valve plate that the sealing surface with step adapts.Preferably, step and valve plate adopt the hard sealing surface.
Further, described sealing surface is taper seat or arc surface.
Further, the sealing surface of described valve plate is provided with groove, is provided with seal in the described groove.Seal is preferably selected flexible seals, and flexible seals is one-body molded through sulfuration and valve plate.
Further, described valve outer wall is equipped with polytetrafluoroethylene (PTFE) back-up ring and O RunddichtringO, and the polytetrafluoroethylene (PTFE) back-up ring is positioned at the low-pressure side of O RunddichtringO.
Further, described valve body is provided with the valve plate groove that cooperates with valve plate, and described valve plate groove is arranged on valve plate and opens on the valve body of a side.
Compared with prior art, the utlity model has following beneficial effect:
One, storm valve of the present utility model comprises valve body, and valve body is hollow structure, also comprises valve plate, and a side of valve plate is in bearing pin is connected to valve body, and valve plate is equipped with the spring that valve plate is resetted, and valve body is provided with the step that cooperates with valve plate.The utility model can play the generation that prevents gas blowout accident, can in the situation of not taking out drilling tool, directly logging tool be stretched in the well again and detect, in the process that is detecting, when blowout occurring, the rapid extraction logging tool is abandoned logging tool, valve plate resets under the effect of back-moving spring, guarantees to cooperate with step, prevents the generation of blowout.So that the utility model can shorten the cycle of drilling well, reduce drilling cost, guaranteed to implement in the drilling process safety of well logging.
Two, the utility model step and valve plate are provided with coadapted sealing surface, preferably select hard sealing surface, have good resistance to pressure, and down-hole pressure is larger, and sealing effectiveness is better.
Three, sealing surface of the present utility model is taper seat or arc surface, can improve the effect of sealing.
Four, the sealing surface of valve plate of the present utility model is provided with groove, is provided with seal in the groove.Seal is preferably selected flexible seals, flexible seals is one-body molded through sulfuration and valve plate, and valve plate adopts the sealing means of soft or hard combination, has greatly promoted the sealing performance of valve plate, and flexible seals is one-body molded through sulfuration and valve plate, has improved the erosion resistibility of flexible seals.
Five, valve outer wall of the present utility model is equipped with polytetrafluoroethylene (PTFE) back-up ring and O RunddichtringO, and the polytetrafluoroethylene (PTFE) back-up ring is positioned at the low-pressure side of O RunddichtringO.Prevent from being squeezed in the gap of low-pressure side in the effect lower seal of pressure, protect the impaired or destruction of sealing ring, prolonged the application life of seal.
Six, valve body of the present utility model is provided with the valve plate groove that cooperates with valve plate, and the valve plate groove is arranged on valve plate and opens on the valve body of a side.When the stretching into of cable of well logging, valve plate rotates around bearing pin, and embeds and be arranged in the valve plate groove of valve body, so that valve plate can not affect passage, improves further Practical Performance of the present utility model.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the partial enlarged drawing at Figure 1A place;
Fig. 3 is the utility model mounting structure schematic diagram;
Mark among the figure: 1, valve body, 2, bearing pin, 3, valve plate, 4, the valve plate groove, 5, the polytetrafluoroethylene (PTFE) back-up ring, 6, the O RunddichtringO, 7, the sealing surface of step, 8, the sealing surface of valve plate, 9, seal, 10, groove, 11, short circuit.
The specific embodiment
The utility model will be further described below in conjunction with the drawings and the specific embodiments.
Storm valve of the present utility model, comprise valve body, valve body is hollow structure, also comprise valve plate, one side of valve plate is in bearing pin is connected to valve body, and valve plate is equipped with the spring that valve plate is resetted, and is used for the setting of the spring that valve plate resets, those skilled in the art can both understand and understand, and does not repeat them here; Valve body is provided with the step that cooperates with valve plate.The utility model can play the generation that prevents gas blowout accident, can in the situation of not taking out drilling tool, directly logging tool be stretched in the well again and detect, in the process that is detecting, when blowout occurring, rapid extraction logging tool or abandon logging tool, valve plate resets under the effect of back-moving spring, guarantees to cooperate with step, prevents the generation of blowout.So that the utility model can shorten the cycle of drilling well, reduce drilling cost, effectively control simultaneously gas blowout accident.
The utility model step and valve plate are provided with sealing surface, preferably select hard sealing surface, and hard sealing surface namely adopts metal sealing, has good resistance to pressure, and down-hole pressure is larger, and sealing effectiveness is better.
Sealing surface of the present utility model is taper seat or arc surface, and the radian of the sealing surface on the sealing surface on the valve body and the valve plate must guarantee consistent, just can play sealing effectiveness.The sealing surface of valve plate is provided with groove, and preferably groove is ring-type, is provided with seal in the groove.Seal is preferably selected flexible seals, flexible seals is one-body molded through sulfuration and valve plate, and valve plate adopts the sealing means of soft or hard combination, has greatly promoted the sealing performance of valve plate, and flexible seals is one-body molded through sulfuration and valve plate, has improved the erosion resistibility of flexible seals.
Valve outer wall of the present utility model is equipped with polytetrafluoroethylene (PTFE) back-up ring and O RunddichtringO, and the polytetrafluoroethylene (PTFE) back-up ring is positioned at the low-pressure side of O RunddichtringO.Prevent from being squeezed in the gap of low-pressure side in the effect lower seal of pressure, protect the impaired or destruction of sealing ring, prolonged the application life of seal.
Valve body of the present utility model is provided with the valve plate groove that cooperates with valve plate, and the valve plate groove is arranged on valve plate and opens on the valve body of a side.When the stretching into of logging tool, valve plate rotates around bearing pin, and embeds and be arranged in the valve plate groove of valve body, so that valve plate can not affect passage, improves further Practical Performance of the present utility model.
The assembling process of the utility model one embodiment is: process respectively first valve body and valve plate, in order to realize effective sealing, when processing valve plate groove and pin shaft hole, should accomplish accurate processing, otherwise after loading onto, valve plate will be difficult to realize the effect that seals, when processing the hard sealing surface of camber that cooperatively interacts, its radian must be consistent.After the completion of processing, polytetrafluoroethylene (PTFE) back-up ring and O RunddichtringO are loaded onto in the garden outside the valve body upper end, fill first polytetrafluoroethylene (PTFE) back-up ring 5, and rear dress O RunddichtringO guarantees that the O RunddichtringO does not damage.
Then, on the arc sealing surface of valve plate, load onto flexible seals in the mode of sulfuration, then valve plate is packed in the valve body, load onto spring, put on bearing pin and just finished the work of installing, then the utility model integral body is pressed in the short circuit with the same diameter of drilling tool, pack into from the short circuit box end when packing into, the O RunddichtringO of rear the utility model upper end of packing into forms with the short circuit inwall and seals, screw in a retainer ring by box end again, play fixedly the position of the utility model in short circuit and prevent the effect that the utility model is poured out from short circuit.
Use procedure of the present utility model: in the work progress of implementing drilling well, the utility model is connected on the drilling tool string of design, in drilling process, under the pressure of mud, valve plate is opened, and realizes the circulation of mud; If need to implement the work of well logging, stop first to bore, guaranteeing do not have to stop mud circulation in the situation of well kick, at this moment, valve plate of the present utility model pops up under the effect of spring, closes the middle passage of drilling tool; Then be lowered to logging tool from well head, when logging tool arrives the position of the utility model setting, under the effect of logging tool weight, valve plate can be open and continue to arrive the position of well logging downwards, because the channel diameter of reserving after the valve plate that arranges is opened is consistent with the passage of drilling tool, so logging tool can arrive the degree of depth of underground logging smoothly; After well logging is finished, propose logging tool under the traction of wirerope, after logging tool passed through the position of valve plate, owing to there be not stopping of logging tool, valve plate can be closed under the effect of back-moving spring again; If in the process of well logging well kick occurs, just propose fast logging tool or abandon logging tool, valve plate resets under the effect of spring and closes, and the fluid of down-hole can not be rushed to ground by the passage of drilling tool, has guaranteed to implement in the drilling process safety of well logging.
Claims (6)
1. a safety valve comprises valve body, and described valve body is hollow structure, it is characterized in that: also comprise valve plate, one side of described valve plate is in bearing pin is movably connected in valve body, and described valve plate is equipped with the spring that valve plate is resetted, and described valve body inner circle is provided with the step that cooperates with valve plate.
2. safety valve according to claim 1, it is characterized in that: described step is provided with sealing surface, and described valve plate is provided with the sealing surface of valve plate that the sealing surface with step adapts.
3. safety valve according to claim 2, it is characterized in that: described sealing surface is taper seat or arc surface.
4. safety valve according to claim 3, it is characterized in that: the sealing surface of described valve plate is provided with groove, is provided with seal in the described groove.
5. safety valve according to claim 1, it is characterized in that: described valve outer wall is equipped with polytetrafluoroethylene (PTFE) back-up ring and O RunddichtringO, and the polytetrafluoroethylene (PTFE) back-up ring is positioned at the low-pressure side of O RunddichtringO.
6. safety valve according to claim 1, it is characterized in that: described valve body is provided with the valve plate groove that cooperates with valve plate, and described valve plate groove is arranged on valve plate and opens on the valve body of a side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240512 CN203239285U (en) | 2013-05-07 | 2013-05-07 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320240512 CN203239285U (en) | 2013-05-07 | 2013-05-07 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203239285U true CN203239285U (en) | 2013-10-16 |
Family
ID=49316595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320240512 Expired - Lifetime CN203239285U (en) | 2013-05-07 | 2013-05-07 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203239285U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074493A (en) * | 2014-07-09 | 2014-10-01 | 中国海洋石油总公司 | Thermal recovery antipollution underground switch |
| CN111434881A (en) * | 2019-01-15 | 2020-07-21 | 中国石油天然气股份有限公司 | Check valve |
| CN113417599A (en) * | 2021-08-10 | 2021-09-21 | 四川恒铭泽石油天然气工程有限公司 | Underground switch valve for electric control oil-gas well |
-
2013
- 2013-05-07 CN CN 201320240512 patent/CN203239285U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074493A (en) * | 2014-07-09 | 2014-10-01 | 中国海洋石油总公司 | Thermal recovery antipollution underground switch |
| CN111434881A (en) * | 2019-01-15 | 2020-07-21 | 中国石油天然气股份有限公司 | Check valve |
| CN113417599A (en) * | 2021-08-10 | 2021-09-21 | 四川恒铭泽石油天然气工程有限公司 | Underground switch valve for electric control oil-gas well |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: High tech Zone Gaopeng road in Chengdu city of Sichuan province 610041 5 Building No. 2 Room 501 Patentee after: CHENGDU OUXUN TECHNOLOGY Co.,Ltd. Address before: High tech Zone Gaopeng road in Chengdu city of Sichuan province 610041 No. 5 B block 201 Patentee before: CHENGDU OUXUN MARINE ENGINEERING EQUIPMENT CO.,LTD. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131016 |
|
| CX01 | Expiry of patent term |